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9f354310 | 1 | /** @file |
2 | I2c Bus byte read/write functions. | |
3 | ||
4 | Copyright (c) 2008 - 2009, Intel Corporation | |
5 | All rights reserved. This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | **/\r | |
14 | \r | |
15 | #ifndef _CIRRUS_LOGIC_I2C_H_\r | |
16 | #define _CIRRUS_LOGIC_I2C_H_\r | |
17 | \r | |
18 | #include <Protocol/PciIo.h>\r | |
19 | \r | |
20 | /**\r | |
21 | Read one byte data on I2C Bus.\r | |
22 | \r | |
23 | Read one byte data from the slave device connectet to I2C Bus.\r | |
24 | If Data is NULL, then ASSERT().\r | |
25 | \r | |
26 | @param PciIo The pointer to PCI_IO_PROTOCOL.\r | |
27 | @param DeviceAddress Slave device's address.\r | |
28 | @param RegisterAddress The register address on slave device.\r | |
29 | @param Data The pointer to returned data if EFI_SUCCESS returned.\r | |
30 | \r | |
31 | @retval EFI_DEVICE_ERROR\r | |
32 | @retval EFI_SUCCESS\r | |
33 | \r | |
34 | **/\r | |
35 | EFI_STATUS\r | |
36 | EFIAPI\r | |
37 | I2cReadByte (\r | |
38 | EFI_PCI_IO_PROTOCOL *PciIo,\r | |
39 | UINT8 DeviceAddress,\r | |
40 | UINT8 RegisterAddress,\r | |
41 | UINT8 *Data\r | |
42 | );\r | |
43 | \r | |
44 | /**\r | |
45 | Write one byte data onto I2C Bus.\r | |
46 | \r | |
47 | Write one byte data to the slave device connectet to I2C Bus.\r | |
48 | If Data is NULL, then ASSERT().\r | |
49 | \r | |
50 | @param PciIo The pointer to PCI_IO_PROTOCOL.\r | |
51 | @param DeviceAddress Slave device's address.\r | |
52 | @param RegisterAddress The register address on slave device.\r | |
53 | @param Data The pointer to write data.\r | |
54 | \r | |
55 | @retval EFI_DEVICE_ERROR\r | |
56 | @retval EFI_SUCCESS\r | |
57 | \r | |
58 | **/\r | |
59 | EFI_STATUS\r | |
60 | EFIAPI\r | |
61 | I2cWriteByte (\r | |
62 | EFI_PCI_IO_PROTOCOL *PciIo,\r | |
63 | UINT8 DeviceAddress,\r | |
64 | UINT8 RegisterAddress,\r | |
65 | UINT8 *Data\r | |
66 | );\r | |
67 | \r | |
68 | #endif\r |